<template>
	<div class="userBg">
		<div class="container">
			<div class="timeLine">
				<div class="item" v-for="(item,index) in students" :key="index" @click="changeScore(item)">
					<h3>{{item.student}}</h3>
				</div>
			</div>
		</div>
		
		<div class="loadBox" v-if="searchLoading">
			<u-loading-icon size="36" mode="circle" :vertical="true" color="red" text="加载中..." textSize="20"></u-loading-icon>
		</div>
		
		<canvas canvas-id="waterMark" class="waterMark" style="width: 100vw; height: 100vh;"></canvas>
		<image :src="waterMarkUrl" class="waterMark-bg" style="width: 100vw; height: 100vh;"></image>
	</div>
</template>

<script>
	import {
		mapActions
	} from 'vuex';
	const db = wx.cloud.database()
	export default {
		data() {
			return {
				banner: 'https://www.baixuemianshi.com/zhuanti/tiku/images/banner.jpg?' + new Date(),
				waterMarkUrl: "",
				windowWidth: 100,
				windowHeight: 100,
				xbls:"",
				banji:"",
				students:[],
				searchLoading: true
			}
		},
		onShow() {
			if(wx.setVisualEffectOnCapture){
			    wx.setVisualEffectOnCapture({
			        visualEffect: 'hidden',
			        success:(res) => {
			            console.log('success回调',res)
			        },
			    })
			}
		},
		onHide() {
			if(wx.setVisualEffectOnCapture){
			    wx.setVisualEffectOnCapture({
			        visualEffect: 'none',
			        success:(res) => {
			            console.log('success回调',res)
			        },
			    })
			}
		},
		onLoad(options) {
			this.xbls = options.xbls
			this.getStudents(0)
			
			
		},
		computed: {
			userphone() {
				return this.$store.getters.userphone ? this.$store.getters.userphone : '';
			}
		},
		created() {
			let that = this;
			
			
		},
		mounted() {
			let that = this 
			if(this.userphone){
				this.drawWaterMark(this.userphone);
			}else{
				this.drawWaterMark('雪恒教育-白雪面试');
			}
		},
		watch: {
			
		},
		methods: {
			...mapActions(['LogSetPhone','LogSetOpenid']),
			drawWaterMark(text) {
				this.getDeviceInfo().then(response => {
					const w = response.windowWidth;
					const h = response.windowHeight;
					this.windowWidth = w;
					this.windowHeight = h;
					//创建canvas绘制上下文
					const canvas = uni.createCanvasContext("waterMark", this);
					canvas.clearRect(0, 0, w, h)
					//开始创建一个路径，需要调用fill或者stroke才会使用路径进行填充或描边。
					canvas.beginPath();
					canvas.setFontSize(18);
					canvas.setFillStyle('rgba(0, 0, 0, 0.1)');
					canvas.rotate(-30 * Math.PI / 180)
					if (text) {
						text = this.trim(text)
					}
					const maxWidth = text.length * 18
					for (let x = 0; x < 10; x++) {
						for (let y = 0; y < 20; y++) {
							//在画布上绘制被填充的文本。
							canvas.fillText(text, (maxWidth + 40) * x - 400, 90 * y + 20);
						}
					}
					//将之前在绘图上下文中的描述（路径、变形、样式）画到 canvas 中。
					canvas.draw(false, () => {
						//把当前画布指定区域的内容导出生成指定大小的图片
						uni.canvasToTempFilePath({
							canvasId: "waterMark",
							complete: (res) => {
								this.waterMarkUrl = res.tempFilePath
							}
						}, this)
					})
				});
			},
			trim(str) {
				let trimStr = '';
				const reg = /[\t\r\f\n\s]*/g;
				if (typeof str === 'string') {
					trimStr = str.replace(reg, '');
				}
				return trimStr
			},
			/**
			 * 获取当前设备的信息
			 * **/
			getDeviceInfo() {
				return new Promise((resolve, reject) => {
					uni.getSystemInfo({
						success: (sysInfo) => {
							resolve(sysInfo)
						}
					})
				})
			},
			getStudents(page){
				let that = this
				db.collection('24gk_pingfen').skip(20 * page ).limit(20).where({
					xbls:that.xbls
				}).get({
					success: res => {
						if(res.data.length > 0){
							that.students = that.students.concat(res.data)
							let p = page + 1
							that.getStudents(p)
						}else{
							that.searchLoading = false
						}
						
					}
				})
			},
			
			changeScore(info){
				uni.navigateTo({
					url:"./img?xbls=" + this.xbls + '&student=' + info.student
				})
			},
			getTime(){
				let that = this
				let day = new Date()
				let y = day.getFullYear()
				let m = (day.getMonth() + 1).toString().padStart(2, '0');
				let d = day.getDate().toString().padStart(2, '0');
				let hour = day.getHours().toString().padStart(2, '0');
				let miu = day.getMinutes().toString().padStart(2, '0');
				let time = y + '-' + m + '-' + d
				return time
			},
			
		},
		components: {
			
		}
	};
</script>

<style scoped>
	@import url(./index.css);
</style>